Which is the most stable firmware for WRV200?

Recently, I setup a WRV200 for a wireless network. But the router is very unstable after few hours that usually can not access the web page or ping the router usually result a high (xxx ms) around 500ms~2000ms. The router will go normal if I replug the power adaptor.

I had the same problem with 1.0.32, and was using 1.0.35 till today... it seems DYNDNS isn't really working very well - I just upgraded to 1.0.36 which seems to solve my issue using dyndns.
1.0.35 updates dyndns every hour (even without a change)
1.0.36 is now updated 1h15 minutes ago, so it takes at least longer than 60 minutes right now